Urine

urinaryhuman urinepissliquid wastepeeurinatedurine pHapple juiceDark urinegreenish-bluish discoloration
Urine is a liquid by-product of metabolism in humans and in many animals.wikipedia
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Kidney

kidneysrenalrenal circulation
Urine flows from the kidneys through the ureters to the urinary bladder.
Each kidney is attached to a ureter, a tube that carries excreted urine to the bladder.

Urinary bladder

bladderfundusintravesical
Urine flows from the kidneys through the ureters to the urinary bladder.
The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination.

Urination

urinateurinatingmicturition
Urination results in urine being excreted from the body through the urethra.
Urination is the release of urine from the urinary bladder through the urethra to the outside of the body.

Ureter

uretersureteralureteropelvic junction
Urine flows from the kidneys through the ureters to the urinary bladder.
In human anatomy, the ureters are tubes made of smooth muscle fibers that propel urine from the kidneys to the urinary bladder.

Urea

carbamideCO(NH 2 ) 2 urea spraying systems
The cellular metabolism generates many by-products which are rich in nitrogen and must be cleared from the bloodstream, such as urea, uric acid, and creatinine. In humans, soluble wastes are excreted primarily by the urinary system and, to a lesser extent in terms of urea, removed by perspiration.
Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.

Uric acid

urateuricblood uric acid
The cellular metabolism generates many by-products which are rich in nitrogen and must be cleared from the bloodstream, such as urea, uric acid, and creatinine.
Uric acid is a product of the metabolic breakdown of purine nucleotides, and it is a normal component of urine.

Reuse of excreta

reusereuse excretaexcreta as a fertiliser
Therefore, urine can be used as a fertilizer.
Reuse of excreta (or re-use or use of excreta) refers to the safe, beneficial use of animal or human excreta, i.e. feces (or faeces in British English) and urine.

Excretion

excretedexcretoryexcrete
Urination results in urine being excreted from the body through the urethra.
For example, in mammals urine is expelled through the urethra, which is part of the excretory system.

Urethra

male urethraurethralfemale urethra
Urination results in urine being excreted from the body through the urethra.
The urethra provides an exit for urine as well as semen during ejaculation.

Lant

Historically, aged or fermented urine (known as lant) was also used for gunpowder production, household cleaning, tanning of leather and dyeing of textiles.
Lant is a word for aged urine, originating from the Old English word land referring to urine in general.

Human feces

stoolfecesstools
Human urine and feces are collectively referred to as human waste or human excreta, and are managed with a sanitation system.
Human feces together with human urine are collectively referred to as human waste or human excreta.

Human waste

excretahuman excretaordure
Human urine and feces are collectively referred to as human waste or human excreta, and are managed with a sanitation system.
Human waste (or human excreta) refers to the waste products of the human digestive system and the human metabolism, namely feces and urine.

Urinary system

urinary tracturinaryrenal system
In humans, soluble wastes are excreted primarily by the urinary system and, to a lesser extent in terms of urea, removed by perspiration.
Following filtration of blood and further processing, wastes (in the form of urine) exit the kidney via the ureters, tubes made of smooth muscle fibres that propel urine towards the urinary bladder, where it is stored and subsequently expelled from the body by urination (voiding).

Nitrogen cycle

nitrogen metabolismnitrogennitrogen cycling
Urine has a role in the earth's nitrogen cycle.
For example, the nitrogenous wastes in animal urine are broken down by nitrifying bacteria in the soil to be used as new.

Anuria

No urine productionabsence of urine formationabsent
Polyuria is a condition of excessive production of urine (> 2.5 L/day), oliguria when < 400 mL are produced, and anuria one of < 100 mL per day.
Anuria, sometimes called anuresis, is nonpassage of urine, in practice is defined as passage of less than 100 milliliters of urine in a day.

Excretory system

excretoryexcretory functionsexcretory organ
Most animals have excretory systems for elimination of soluble toxic wastes.
In humans and other amniotes (mammals, birds and reptiles) most of these substances leave the body as urine and to some degree exhalation, mammals also expel them through sweating.

Oliguria

low urine outputdecreased urine outputoliguric
Polyuria is a condition of excessive production of urine (> 2.5 L/day), oliguria when < 400 mL are produced, and anuria one of < 100 mL per day.
Oliguria or hypouresis (both names from roots meaning "not enough urine") is the low output of urine.

Urobilin

urochrome
In the urine of a healthy individual the color comes primarily from the presence of urobilin.
Urobilin or urochrome is the chemical primarily responsible for the yellow color of urine.

Phenazopyridine

pyridiumphenylazopyridazil
Certain medications such as rifampin and phenazopyridine can cause orange urine.
Phenazopyridine is a chemical which, when excreted into the urine, has a local analgesic effect.

Hematuria

blood in the urinehaematuriabloody urine
Bloody urine is termed hematuria, a symptom of a wide variety of medical conditions.
Hematuria is the presence of red blood cells in the urine.

Tanning (leather)

tannerytanningtanner
Historically, aged or fermented urine (known as lant) was also used for gunpowder production, household cleaning, tanning of leather and dyeing of textiles.
This was done by either soaking the skin in urine, painting it with an alkaline lime mixture, or simply allowing the skin to putrefy for several months then dipping it in a salt solution.

Beeturia

pink urine
Reddish or brown urine may be caused by porphyria (not to be confused with the harmless, temporary pink or reddish tint caused by beeturia).
Beeturia is the passing of red or pink urine after eating beetroots or foods colored with beetroot extract or beetroot pigments.

Purple urine bag syndrome

PUBS
Purple urine may be due to purple urine bag syndrome.
Purple urine bag syndrome, or PUBS is a medical syndrome where purple discoloration of urine occurs in people with urinary catheters and co-existent urinary tract infection.

Mammal

mammalsmammalianmammalia
A urinalysis can detect nitrogenous wastes of the mammalian body.
Bilirubin, a waste product derived from blood cells, is passed through bile and urine with the help of enzymes excreted by the liver.

Asparagusic acid

asparagusate
Eating asparagus can cause a strong odor reminiscent of the vegetable caused by the body's breakdown of asparagusic acid.
It is found in asparagus and is believed to be the metabolic precursor to odorous sulfur compounds responsible for the distinctive smell of urine which has long been associated with eating asparagus.